Fair Value Measurements (Schedule Of Changes In Level 3 Fair Value Liabilities) (Details) (Debt [Member], USD $) In Millions	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
Debt [Member]
Beginning balance, Debt	$ (144)
Issuance of promissory note		(139)
Foreign exchange translation adjustment	(4)
Accretion of promissory note	(2)
Redemptions of principal	46
Ending balance, Debt	$ (104)	$ (139)